Current backer boards (100pk)BCW DirectCurrent Comic Book Backing Boards The BCW Current Comic Backer Boards are made from a full 24 point solid bleached sulfate, coated on one side with a buffered with 3% calcium carbonate , and are precision cut to size. Use this item along with current comic bags to protect and store your collectible comics.- Fit current comic bags- Coated on one side- Buffered with 3% calcium carbonate- Precision cut- Use with BCW Current Poly & Mylar Bags- Size 6 3/4 X 10 1/2*Certified Acid Free - Independent Lab Tested